6616136645 has 8 divisors (see below), whose sum is σ = 8284553856. Its totient is φ = 5062782736.

The previous prime is 6616136641. The next prime is 6616136689. The reversal of 6616136645 is 5466316166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6616136645 - 2² = 6616136641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6616136596 and 6616136605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6616136641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28765697 + ... + 28765926.

It is an arithmetic number, because the mean of its divisors is an integer number (1035569232).

Almost surely, 2^6616136645 is an apocalyptic number.

It is an amenable number.

6616136645 is a deficient number, since it is larger than the sum of its proper divisors (1668417211).

6616136645 is a wasteful number, since it uses less digits than its factorization.

6616136645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57531651.

The product of its digits is 466560, while the sum is 44.

The square root of 6616136645 is about 81339.6376006188. The cubic root of 6616136645 is about 1877.3049361677.

The spelling of 6616136645 in words is "six billion, six hundred sixteen million, one hundred thirty-six thousand, six hundred forty-five".